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DynamoDB - Coggle Diagram

- - - - AccessDeniedException
      - ConditionalCheckFailedException
      - IncompleteSignatureException
      - ItemCollectionSizeLimitExceededException
      - LimitExceededException
      - MissingAuthenticationTokenException
      - ProvisionedThroughputExceededException
      - RequestLimitExceeded
      - ResourceInUseException
      - ResourceNotFoundException
      - ThrottlingException
      - UnrecognizedClientException
      - ValidationException
    - - If you're not using an AWS SDK, you should retry original requests that receive server errors (5xx).
- - - - 2 eventually consistent read requests
      - 1 strongly consistent read request
    - - If your item size is 8 KB, you require 2 read request units to sustain one strongly consistent read, 1 read request unit if you choose eventually consistent reads, or 4 read request units for a transactional read request.
    - - 2 strongly consistent read requests units
      - 1 eventual consistent read request units
    - - 4 strongly consistent read request units
      - 2 eventual consistent read request units
  - - - represents 1 write for an item up to 1 KB in size
- - - - Partition Keys have to be unique
      - Composite keys can have the same Partition Key but the sort key must be unique to the Partition key.
  - - - Can be Simple or Composite
        
        The Partition key can be the same or different to the Table Partition key.
      - Can be added after the table has been created
      - You can query the whole table.
      - Supports eventual consistent reads only.
    - - Must be Composite - Partition and Sort Key
        
        Has to have the same Partition Key as the Table.
      - Must be created at the time of table creation. It can not be added later.
      - Supports both eventual consistent reads as well as strong consistent reads.
      - Query over a single partition only.
- - - - If you need more than double your previous peak on table, DynamoDB automatically allocates more capacity as your traffic volume increases to help ensure that your workload does not experience throttling.
      - Throttling can occur if you exceed double your previous peak within 30 minutes